The proportion of downcomers installed in...

Question 1 / 270705eccefa0bacbc34ba4d46c90

Question 1 of 270705eccefa0bacbc34ba4d46c90

The proportion of downcomers installed in relation to riser tubes in a vertical tube type of boiler, is dependent upon the __________.

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Question 1 of 27070

The proportion of downcomers installed in relation to riser tubes in a vertical tube type of boiler, is dependent upon the __________.

🔍 Key Concepts

• Natural circulation in a vertical tube boiler • Relationship between density difference of water/steam and circulation flow path • What design factor directly changes the required area ratio of downcomers to riser tubes

💭 Think About

• Ask yourself: which option actually affects how much water needs to circulate versus how much steam is being produced in the tubes? • Which factor would a boiler designer use to size the flow paths (downcomers and risers), rather than an operating/control setting? • Think about what has to increase if the boiler is required to generate more steam per unit time.

✅ Before You Answer

• Verify which choices are design parameters (fixed when the boiler is built) versus control/operating parameters (may change with operation). • Identify which factor most directly affects required circulation rate through the generating tubes. • Eliminate any option that does not logically change the needed ratio of water going down to the water/steam mixture going up.

Question 1 of 27070

The proportion of downcomers installed in relation to riser tubes in a vertical tube type of boiler, is dependent upon the __________.

degree of superheat

type of water level control

steam output of the boiler

position of the mud drum

Question 1 / 270705eccefa0bacbc34ba4d46c90

Question 1 of 270705eccefa0bacbc34ba4d46c90

The proportion of downcomers installed in relation to riser tubes in a vertical tube type of boiler, is dependent upon the __________.

Back

Question 1 of 27070

The proportion of downcomers installed in relation to riser tubes in a vertical tube type of boiler, is dependent upon the __________.